For what it's worth, I have been running the wall dimmers, wall swiched, and tabletop dimmers on MX1200, MX890, MX990, and MX6000 with no issues. The only oddity I have found is that when in the database, I had to choose the "UNIVERSAL REMOTE CONTROL *" vendor entry, and not "Universal Remote Control" (iirc). But once done, all worked fine. The *only* thing kicking my butt at the moment is trying to add a KP900 . . . It works for everything else, but I just can't get lighting to go.

Oh, and be sure to set the lighting devices to "RF" when you configure the remote!